Public Property TimeExtent As TimeExtent

public TimeExtent TimeExtent {get; set;}

<Grid x:Name="LayoutRoot">
  
  <!-- Define two SimpleMarkerSymbol's and a SpatialReference in the Resources section of the XAML file. -->
  <Grid.Resources>
   
    <!-- 
    Tip: Use x:Key Attribute and not x:Name Attribute for defining the name of the Resources so that
    you can access the Resource in the code-behind file. 
    -->
    
    <!-- The 'RedMarkerSymbol' will be used as the default symbol for the Graphics. -->
    <esri:SimpleMarkerSymbol x:Key="RedMarkerSymbol" Color="Red" Size="12" Style="Circle" />
    
    <!-- 
    Define a SpatialReference object that has the same WKID as the ArcGISTiledMapServiceLayer in
    the Map. This will allow for the Graphics in the GraphicsLayer to line up properly. 
    -->
    <esri:SpatialReference x:Key="theSpatialReference" WKID="102100"/>
    
  </Grid.Resources>
  
  <!-- 
  Add a Map control with an ArcGISTiledMapServiceLayer and a GraphicsLayer. The Map.TimeExtent is
  bound to the MyTimeSlider (TimeSlider) control. The MyTimeSlider will control what TimeExtent (i.e.
  slices of time) can be viewed in the Map control.
        
  The GraphicsLayer will contain several Graphics based upon MapPoint geometries (which use the 
  defined SpatialReference) which use the RedMarkerSymbol as the default symbolization, and have various 
  TimeExtent values set. When the specific Graphic elements have a TimeExtent that falls within the 
  Map.TimeExtent will they be displayed based upon the MyTimeSlider settings.
  -->
  <esri:Map Background="White" HorizontalAlignment="Left" Margin="12,108,0,0" Name="Map1" 
            VerticalAlignment="Top" Height="318" Width="341" 
            TimeExtent="{Binding ElementName=MyTimeSlider, Path=Value}">
    
    <esri:ArcGISTiledMapServiceLayer ID="PhysicalTiledLayer" 
                   Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer" />
    
    <!-- 
    It is important to provide the GraphicsLayer with an 'ID' Attribute so to be able to access it
    in the code-behind file. 
    -->
    <esri:GraphicsLayer ID="MyGraphicsLayer" >
    
      <esri:GraphicsLayer.Graphics>
      
        <!-- 
        Each Graphic added to the GraphicsLayer will have it's symbology, time extent and geometry defined. 
        -->
        
        <esri:Graphic Symbol="{StaticResource RedMarkerSymbol}" TimeExtent="2000/08/04 12:00:01 UTC" >
          <esri:MapPoint X="-7356594.25" Y="4752385.95" SpatialReference="{StaticResource theSpatialReference}"/>
        </esri:Graphic>
        
        <esri:Graphic Symbol="{StaticResource RedMarkerSymbol}" TimeExtent="2000/08/07 06:30:00 UTC">
          <esri:MapPoint X="5654893.89" Y="3718746.02" SpatialReference="{StaticResource theSpatialReference}"/>
        </esri:Graphic>
        
        <esri:Graphic Symbol="{StaticResource RedMarkerSymbol}" TimeExtent="2000/08/10 05:15:15 UTC">
          <esri:MapPoint X="-13654893.89" Y="-1718746.02" SpatialReference="{StaticResource theSpatialReference}"/>
        </esri:Graphic>
        
        <esri:Graphic Symbol="{StaticResource RedMarkerSymbol}" TimeExtent="2000/08/14 03:03:00 UTC">
          <esri:MapPoint X="3654893.89" Y="7718746.02" SpatialReference="{StaticResource theSpatialReference}"/>
        </esri:Graphic>
        
        <esri:Graphic Symbol="{StaticResource RedMarkerSymbol}" TimeExtent="2000/08/18 09:11:51 UTC">
          <esri:MapPoint X="6801033.36" Y="10325547.30" SpatialReference="{StaticResource theSpatialReference}"/>
        </esri:Graphic>
        
        <esri:Graphic Symbol="{StaticResource RedMarkerSymbol}" TimeExtent="2000/08/20 01:00:03 UTC">
          <esri:MapPoint X="-5468910.57" Y="1741081.03" SpatialReference="{StaticResource theSpatialReference}"/>
        </esri:Graphic>
        
        <esri:Graphic Symbol="{StaticResource RedMarkerSymbol}" TimeExtent="2000/08/22 18:23:43 UTC">
          <esri:MapPoint X="-4614958.43" Y="-326382.05" SpatialReference="{StaticResource theSpatialReference}"/>
        </esri:Graphic>
        
      </esri:GraphicsLayer.Graphics>
      
    </esri:GraphicsLayer>
    
  </esri:Map>
  
  <!-- 
  Add a TimeSlider to control the display of what geographic features are displayed in the Map Control
  based upon a specified TimeExtent. In the case of this sample code, when the specific Graphic elements 
  have a TimeExtent that falls within the Map.TimeExtent will they be displayed based upon the MyTimeSlider 
  settings.
    
  Tip: It is the x:Name Attribute that allows you to access the TimeSlider Control in the code-behind file. 
  
  The Loop Attribute of True allows continuous playing of the TimeSlider once it intialized in the code-behind.
    
  The PlaySpeed Attribute follows the format of "hh:mm:ss" where, hh = hours (0 to 24), mm = minutes (0 to 60),
  and ss = seconds (0 to 60). In this example the PlaySpeed increments the time intervals every tenth of a second
  (i.e. 0.1).
      
  The TimeMode Attribute of CumulativeFromStart means there is a fixed start date/time (2000/08/04 00:00:00 UTC
  in this example) that does not change and an end date/time that adjusts as the specified Interval (one day 
  in this example which is set in the code-behind) increases. As the 'thumb' of the TimeSlider control moves
  to the right along the slider track the TimeExtent Interval of the TimeSlider increases.
      
  The MinimumValue Attribute specifies the starting date/time of the TimeSlider track.
      
  The MaximumValue Attribute specifies the ending date/time of the TimeSlider track.
    
  The Value Attribute specifies the date/time location of the thumb along the TimeSlider track. The thumb can 
  have a start date/time and end date/time set for a TimeExtent which will display a window of time as the
  thumb moves along the TimeSlider track but this is best for TimeMode Attribute of 'TimeExtent'. Since
  this example is showing a TimeMode of 'CumulativeFromStart' it is best to have the thumb just use a single
  date/time specified for the Value set to the same date/time as the MinimumValue.
    
  The last thing needed to enable the full capabilities of a TimeSlider (i.e. having the play, pause, forward, 
  and back buttons) is to set the Intervals Property. In Silverlight, this can only be done in code-behind to 
  construct the Collection Type of IEnumerable(Of Date). Without the TimeSlider.Intervals being set the user 
  has to manually move the thumb across the TimeSlider track to change the Map.TimeExtent and thereby see what 
  Graphics can be displayed for that date/time window.
  -->
  <esri:TimeSlider x:Name="MyTimeSlider" 
                      Loop="True" PlaySpeed="0:0:0.1"
                      TimeMode="CumulativeFromStart"                 
                      MinimumValue="2000/08/04 00:00:00 UTC"
                      MaximumValue="2000/08/24 00:00:00 UTC"
                      Height="22" Margin="12,80,0,0" 
                      Value="2000/08/04 00:00:00 UTC"
                      HorizontalAlignment="Left" VerticalAlignment="Top" Width="341" />
                      
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="40" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" Width="455" 
             TextWrapping="Wrap" Margin="12,12,0,0" 
             Text="Click the button to initialize the TimeSlider functions (play, pause, forward, back) 
             to display Graphics with TimeExtent Properties set." />
             
  <!-- Add a button to perform the work. -->
  <Button Content="Initialize the TimeSlider" Height="23" HorizontalAlignment="Left" 
          Margin="77,51,0,0" Name="Button1" VerticalAlignment="Top" Width="185" Click="Button1_Click"/>
          
</Grid>

private void Button1_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // This function sets up TimeSlider Intervals that define the tic marks along the TimeSlider track. Intervals 
  // are a Collection of IEnumerable(Of Date) objects. When the TimeSlider.Intervals Property is set along with 
  // the other necessary TimeSlider Properties, the full functionality of the TimeSlider is enabled. This full 
  // functionality includes buttons for Play, Pause, Forward, and Back.
  
  // Obtain the start and end Date/Time values from the TimeSlider named MyTimeSlider that was defined in XAML.
  DateTime myMinimumDate = MyTimeSlider.MinimumValue;
  DateTime myMaximumDate = MyTimeSlider.MaximumValue;
  
  // Create a TimeExtent based upon the start and end date/times.
  ESRI.ArcGIS.Client.TimeExtent myTimeExtent = new ESRI.ArcGIS.Client.TimeExtent(myMinimumDate, myMaximumDate);
  
  // Create a new TimeSpan (1 day in our case).
  TimeSpan myTimeSpan = new TimeSpan(1, 0, 0, 0);
  
  // Create an empty Collection of IEnumerable(Of Date) objects.
  System.Collections.Generic.IEnumerable<DateTime> myIEnumerableDates = null;
  
  // Load all of Dates into the Collection of IEnumerable(Of Date) objects using the 
  // TimeSlider.CreateTimeStopsByTimeInterval Shared/Static function.
  myIEnumerableDates = ESRI.ArcGIS.Client.Toolkit.TimeSlider.CreateTimeStopsByTimeInterval(myTimeExtent, myTimeSpan);
  
  // Set the TimeSlider.Intervals which define the tic marks along the TimSlider track to the IEnumerable(Of Date) 
  // objects.
  MyTimeSlider.Intervals = myIEnumerableDates;
}

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
  
  ' This function sets up TimeSlider Intervals that define the tic marks along the TimeSlider track. Intervals 
  ' are a Collection of IEnumerable(Of Date) objects. When the TimeSlider.Intervals Property is set along with 
  ' the other necessary TimeSlider Properties, the full functionality of the TimeSlider is enabled. This full 
  ' functionality includes buttons for Play, Pause, Forward, and Back.
  
  ' Obtain the start and end Date/Time values from the TimeSlider named MyTimeSlider that was defined in XAML.
  Dim myMinimumDate As Date = MyTimeSlider.MinimumValue
  Dim myMaximumDate As Date = MyTimeSlider.MaximumValue
  
  ' Create a TimeExtent based upon the start and end date/times.
  Dim myTimeExtent As New ESRI.ArcGIS.Client.TimeExtent(myMinimumDate, myMaximumDate)
  
  ' Create a new TimeSpan (1 day in our case).
  Dim myTimeSpan As New TimeSpan(1, 0, 0, 0)
  
  ' Create an empty Collection of IEnumerable(Of Date) objects.
  Dim myIEnumerableDates As System.Collections.Generic.IEnumerable(Of Date)
  
  ' Load all of Dates into the Collection of IEnumerable(Of Date) objects using the 
  ' TimeSlider.CreateTimeStopsByTimeInterval Shared/Static function.
  myIEnumerableDates = ESRI.ArcGIS.Client.Toolkit.TimeSlider.CreateTimeStopsByTimeInterval(myTimeExtent, myTimeSpan)
  
  ' Set the TimeSlider.Intervals which define the tic marks along the TimSlider track to the IEnumerable(Of Date) 
  ' objects.
  MyTimeSlider.Intervals = myIEnumerableDates
  
End Sub